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DOI | 10.1029/2019JD030660 |
Sensitivity of Coarse-Scale Snow-Free Land Surface Shortwave Albedo to Topography | |
Hao, Dalei1,2; Wen, Jianguang1,2; Xiao, Qing1,2; Lin, Xingwen3; You, Dongqin1; Tang, Yong1; Liu, Qiang4; Zhang, Sisi4 | |
2019-08-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:16页码:9028-9045 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | As a widespread landscape, rugged terrain significantly distorts the land surface albedo. Simply neglecting the topographic effects in the land surface albedo modeling and retrievals can lead to large biases and uncertainties over rugged terrain. In spite of gradually increasing research about the topographic effects on the albedo, the albedo sensitivities over rugged terrain to different variables remain unclear. In this paper, the sensitivities of coarse-scale snow-free albedo to topography were quantitatively investigated using the Moderate Resolution Imaging Spectroradiometer (MODIS) land surface albedo data and the variance-based global sensitivity analysis based on a well-established mechanistically-based land surface albedo parameterized model over rugged terrain. The results based on the MODIS data revealed that MODIS land surface albedo over the Tibetan Plateau was highly sensitive to the topographic distribution, and the differences of the spatially averaged snow-free black-sky albedos over grasslands induced by different terrain could reach up to 0.10 in winter. The topographic effects on MODIS albedo are tightly relevant to the land cover type, solar illumination geometries, and vegetation characteristics. The global sensitivity analysis results underscored that topography was an important driving factor of the snow-free albedo, and it accounted for more than 30% of the total variance, respectively. These results highlight the necessities for the topographic consideration in the land surface albedo modeling and retrievals even though the terrain is gentle (10-20 degrees) and advance our understanding of the albedo sensitivities to different variables over rugged terrain, which will facilitate the improvement of land surface albedo parameterization in the land surface models. |
英文关键词 | snow-free albedo topographic effects global sensitivity analysis rugged terrain land surface albedo MODIS albedo |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000490762800009 |
WOS关键词 | BOREAL FOREST ALBEDO ; REFLECTANCE QUANTITIES ; RADIATIVE-TRANSFER ; ALGORITHM ; IMPACT ; MODEL ; MODIS ; BRDF ; CANOPIES ; TERRAIN |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/186145 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Beijing, Peoples R China; 3.Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua, Zhejiang, Peoples R China; 4.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Hao, Dalei,Wen, Jianguang,Xiao, Qing,et al. Sensitivity of Coarse-Scale Snow-Free Land Surface Shortwave Albedo to Topography[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(16):9028-9045. |
APA | Hao, Dalei.,Wen, Jianguang.,Xiao, Qing.,Lin, Xingwen.,You, Dongqin.,...&Zhang, Sisi.(2019).Sensitivity of Coarse-Scale Snow-Free Land Surface Shortwave Albedo to Topography.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(16),9028-9045. |
MLA | Hao, Dalei,et al."Sensitivity of Coarse-Scale Snow-Free Land Surface Shortwave Albedo to Topography".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.16(2019):9028-9045. |
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